Not only did he poke fun at people slamming him for gaining weight this week, by posing with a huge cushion up his shirt. Now he's changed his Twitter name to MRS HORAN and become band mate Niall's fangirl.

The One Direction prankster has posted a series of hilariously gushing images and messages on Twitter mimicking the band's fans for #BeAFanDay (this is definitely a new thing), and the Directioners appear to have taken it well.

Liam started obsessing over Niall last night and posted a photograph of him with the caption: "His arms his eyes ... Is he biting his lip I just DIED! #BeAFanDay," along with another image of the singer playing live and the message: "Oooo I'm such a Niall girl OHH MYFFF GOWDDD IM CRUIYING #BeAFanDay."

Other loving posts included: "Niall is suchhhh a baeee," and a montage of the blonde singer's eyes with the message: "Imagine niall looking at you with those eyes like your the only woman in the world I CAHNT BREAUTHEE #BeAFanDay." It's just the best thing that's ever happened on Twitter, isn't it? And it's nice to see a pop star with a sense of humour.

He wrote to Niall: "Hi @NiallOfficial I made this for you I love you so much it hurts I even love your toes I'm coming to see you tonight," with a photograph of him holding up a sign which read: "I love Niall."

The tweets went on like this for most of the night and Liam was clearly loving his new role as a teenager fangirl - even changing his Twitter bio to: "4/5 follow and yeah i met niall he did a pose with me its not a big deal."

At one point, he got a little carried away and re-tweeted a message Niall wrote about smashing his phone with the caption: "SMASH IT IN MY FACEEE." Brilliant, just brilliant.

But despite his desperate attempts to get his attention and sharing a selfie with Niall, along with the message: "OHHHH MY GODDDD I GOT A SELFIEEEEEEEE," Niall failed to respond, no doubt leaving Liam pretty heartbroken.

Instead, Niall was busy posing in a pair of tights with photographs of Miley Cyrus on and mimicking the Wrecking Ball signer by sticking his tongue out and tweeting her: "@MileyCyrus you left these in New Jersey! They are comfortable , not gona lie #twerk #tongueout."

We imagine Liam probably saw these posts and went home in tears at their gig. Bless him. Now he knows how the entire 1D fandom feel when they don't get a message back. It can be tough, Liam, keep pushing for that re-tweet. He will notice you one day.